Speaker



FIG. 1 is the perspective view of a speaker, embodying our new design;

FIG. 2 is the front view thereof;

FIG. 3 is the rear view thereof;

FIG. 4 is the left-side view thereof;

FIG. 5 is the right-side view thereof;

FIG. 6 is the top plan view thereof; and,

FIG. 7 is the bottom plan view thereof.

The broken lines shown are included for the purpose of illustrating portions of the speaker that form no part of the claim. 

CLAIM The ornamental design for a speaker, as shown and described. 